Malicious PDF — malware analysis report

Static analysis result for SHA-256 723acb38398345dc…

MALICIOUS

PDF

78.3 KB Created: 2021-03-12 07:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 284d41f5d8ac23822ef3cfffc5fe6cc9 SHA-1: bb5a32cc1ac6570b52fefdd6b8e2cb0abf21549a SHA-256: 723acb38398345dc5faaa40d4098fbb7b8773db0820ee3382021b48ae4c2f7e2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to lead users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/123?utm_term=derbyshire+police+report+a+crime+online PDF link annotation
    • https://cdn.sqhk.co/wovovoteg/jdbghhj/people_nearby_app.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/nanuleminijikat-zuvenarof-dalikegorum-diwugof.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/ggjcUge/duxafaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/hfjdYhb/dupos.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/noxuxigovij-fobevirifinebo.pdfIn PDF document text
    • http://itfamily.pro/frigidaire_-_retro_3.2_cu._ft._mini_fridge_-_blackca14z.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/how_to_configure_cisco_router_1841_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/kowipopi/yhcqLja/wegudowaduxutezeres.pdfIn PDF document text
    • http://suvolupijiro.mygamesonline.org/fobomajesilikukuraleleki.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/g6YXgfA/bleach_blade_battlers_2nd_ps2_iso_download.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/how_do_i_fix_the_pick_motor_stalled_on_my_hp_8600.pdfIn PDF document text
    • http://apsmall.space/google_sheets_statistics_add_onj8zgy.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/5D9GH77/archery_master_3d_hacked_apk_download.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/rufelorovazutigatav.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/hhgoght/skylanders_imaginators_nintendo_switch_gameplay.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/5d95e2d39a2b6.pdfIn PDF document text
    • http://cloudmarket.website/how_do_i_setup_my_yamay_smartwatchintmw.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/vhaqlV2/88321502418.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/laxepofirekoxu.pdfIn PDF document text
    • http://discount50.pro/137857778536bmjz.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/kenmore_series_100_washer_not_spinning.pdfIn PDF document text
    • http://cancandance.org/black_and_red_wallpaper_for_pcynn0e.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ZpheCQb/rescue_cut_rope_puzzle_free_online.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/5201420.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_742a1807ccc840f8ad4d5afaa7ce4cd6.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_e4c96e11456844a6b55fd011fe55db22.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D8 5416 bytes
SHA-256: c4e65802af5bdd161b922809194491ade7707f29dd55139778b60315e9fa677f
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10280 bytes
SHA-256: f032a0f4ac448e1cba77fa41be8fbdd6aa4e978e5f34d063f0f8924b947d903f

Open this report in the interactive analyzer, or submit your own file for analysis.